Table 2.

Multivariable logistic regression analysis demonstrating associations between patient characteristics and warm ischemia time ≥30 minutes.

Variable	HR	95% CI	p-value
Nephrometry Score Complexity
Intermediate	1.9	0.9–3.9	0.031
High	7.62	1.7–33.9	0.008
Nephrometry Score	1.4	1.1–1.7	0.001
Tumor Location
Anterior	1.18	0.57–2.4	0.658
Posterior	1.8	0.68–6.8	0.191
Nephrometry Score			0.064
Hilar	2.23	0.0.73–6.8
CCI	1.23	0.95–1.6	0.114
EBL	1.0	0.998–1.02	0.895
Age	0.98	0.94–1.00	0.105
Gender			0.074
Male	2.02	0.94–4.4
Race	1.31	1.02–10.7	0.046
BMI (kg/m2)	0.97	0.91–1.02	0.239
Collecting System Entry	3.28	1.4–7.7	0.006
CKD Stage
I	1.21	0.63–2.31	0.570
II	1.17	0.33–4.08	0.811
≥III	1.68	0.42–6.68	0.463
Surgery Year	0.861	0.67–1.10	0.237
Surgeon	3.12	0.76–12.76	<0.001
GFR, % change	1.02	0.995–1.04	0.1421

BMI, body mass index; CCI, Charlson comorbidity index; EBL, estimated blood loss; GFR, glomerular filtration rate (ml/min/1.73 m²).